place zero renamed and cannot be deleted

I stopped using UFT over a year ago because of a problem.Somehow, place zero, which is supposed to indicate an unknown place, got renamed to "Broitz, Griefenberg, Pomerania."All events with unknown places now occur in Broitz, which is probably 3/4 or more of all of the events in my database.I've tried renaming it back to an unknown place in various ways, without success.Has anyone else had this problem recently, and has a solution been found?If I can't find a solution, I'm forced to upgrade to TMG or PAF.